基于S变换的跳频信号特征参数盲估计

提出了一种基于S变换的未知跳频信号参数盲估计方法。该方法利用S变换良好的时频聚集性,在未知任何先验参数的情况下,能够准确估计出跳频信号的跳频频率、跳变时刻和跳频信号驻留时间等参数。文中阐述了S变换的基本原理,应用S变换对跳频信号进行了分析并与其他时频分析方法作了比较,最后给出了估计跳频信号参数的具体算法步骤,通过计算机仿真得到了较为准确的估计结果,验证了该算法的有效性。

Blind Parameter Estimation of Frequency-hopping Signals Based on S Transform

A new method for estimating the parameters of unknown frequency hopping(FH) signal is presented based on S transform.Considering S transform's perfect localizing characteristic in time-frequency domain,the method can estimate the parameters of FH signals such as hop timing,hopping frequencies and hop duration without knowing any a priori knowledge.This paper introduces the basic principle of S transform,analyzes FH signals using it,and compares it with other time-frequency analysis methods.At last,gives the parameter estimating algorithms,obtains more exact estimating results by computer simulating,and the simulating results show that the proposed method could estimate the FH parameters effectively.